4.3.6 Inserting the piston rod into the cylinder barrel 1. Clean the cylinder barrel with a cloth ( Chapter 5.1 on page 53 ). 2. Grease the following components with the grease included in the set of wearing parts: 1) Chapter 5.2.1 on page 53 2) Chapter 5.2.2 on page 53 3) Do not (completely) fill the installation groove of the lip rings / T-rings and reduction of the seal to the sealing lip (outside) with grease. 3. Position the piston flat against the front side of the cylinder barrel. Note The sealing lip of the lip ring may not fold back against the inside of the piston. If necessary, use a flat object without sharp edges to insert the lip ring into the cylinder barrel. 4.
Insert the lip ring in the cylinder barrel by tilting and turning the ring slightly. 5. Insert the piston fully into the cylinder barrel. 6. Push the piston completely through the cylinder barrel until the first lip ring 7. Pull back the piston rod until the piston sits fully in the cylinder barrel. protrudes from the end of the cylinder barrel. This procedure ensures that the sealing lips of the two lip rings sit correctly in the cylinder barrel. 4.3.7 Repairing and attaching the bearing and end caps 1. Remove the scraper ring 1 from the bearing cap 3 . 2. Remove the O-ring 6 from the bearing and end cap. 3. Pull the holding discs 5 off the bearing and end caps. 4.
Remove the buffer seal 4 from the bearing and end caps. 5. Check the bearing 2 in the bearing cap. Note ISO cylinder with metal bearing (DSBC-…-Q / L / U / L1 / E1 / E2 / E3 / EX4) In case of identifiable damage to the bearing, which could impair its function (e.g. deposits or scoring), the bearing cap or bearing cap with end-position locking must be completely replaced. 1 2 3 4 5 6 6. ISO cylinder with plastic bearing: If damaged, push the bearing out of the bearing cap.
29 / 56 Festo 7DSBCb_en Component Greasing Inside surface of cylinder barrel apply a thin film1) of grease Surface of piston rod apply a thin film1) of grease Piston seal lip rings3) apply thin film1) of grease on the outside Piston surface between lip rings (grease reservoir2)) fill uniformly with grease Cushioning boss / buffer sleeve apply thin film1) of grease on the outside